nddot field sampling and testing manual...district materials coordinator for review, approval, and...

FIELD SAMPLING

AND

TESTING MANUAL

Prepared by

NORTH DAKOTA DEPARTMENT OF TRANSPORTATION BISMARCK, NORTH DAKOTA

www.dot.nd.gov

MATERIALS AND RESEARCH DIVISION Matt Linneman

October 2020

8/30/2007

North Dakota Department of Transportation

Field Sampling and Testing Manual

NOTICE OF DISCLAIMER

The North Dakota Department of Transportation (NDDOT) makes the “Field Sampling and Testing Manual” available on the web and/or as a hard-copy manual on an "as is" basis as a public service.

Under no circumstances does NDDOT warrant or certify the information to be free of errors or deficiencies of any kind. NDDOT specifically disclaims all warranties, express or implied, including but not limited to the warranties of merchantability and fitness for a particular purpose.

The use of any of this information for work which is under contract with the NDDOT does not relieve the user from any obligations assumed by the contract, or from complete and proper fulfillment of the terms of the contract, nor does it entitle the user to compensation for damages of loss which could be attributed to such use.

This information is subject to change by NDDOT. Anyone relying on this information should satisfy himself/herself as to the most current version. The user agrees to accept all risks and consequences flowing from or related to the use, retention, distribution, alteration, or deletion of this information. NDDOT will in no instance be liable for any loss of profit or other damage, including but not limited to special, incidental, consequential, or other damages, even if apprised of the likelihood of such damages.

Intentionally Left Blank

______________________________________________________________________10/01/2020 Revised

FIELD SAMPLING AND TESTING MANUAL

TITLE PAGE NOTICE OF DISCLAIMER

TABLE OF CONTENTS

REVISIONS

SECTION 100 GENERAL INSTRUCTIONS SECTION 200 EARTHWORK SECTION 300 BASES SECTION 400 BITUMINOUS PAVEMENTS SECTION 500 RIGID PAVEMENT SECTION 600 STRUCTURES SECTION 700 MISCELLANEOUS CONSTRUCTION TESTING PROCEDURES FOR ALL TESTS ROUNDING PROCEDURES FOR DETERMINING SIGNIFICANT DIGIT RANDOM SAMPLING AND TESTING PROCEDURES QUALITY ASSURANCE PROGRAM FOR PRESTRESSED AND PRECAST CONCRETE PRODUCTS


SECTION 100

GENERAL INSTRUCTIONS

6/1/2016 Revised 100 1 of 1

SECTION 100 TABLE OF CONTENTS

Section 100 Outline 100.01 Introduction 100.02 Duties and Responsibilities 100.03 Procurement of Equipment and Supplies 100.04 Samples and Sampling Section 101 Abbreviations and Definitions Section 105 Control of Work 105.01 Inspection of Work Section 106 Control of Material 106.01 Description 106.02 General Methods 106.03 Independent Assurance Sample and Test Program

100.01

Section 100

OUTLINE

100.01 INTRODUCTION.

This manual defines the procedures for field sampling, testing, inspecting, projects.

contents this manual the numbering sequence outlined in the Standard Specifications. As an example, test requirements Section 408 of Standard Specifications can be found in Section 408 this manual. This section gives required instructions methods in sampling, testing, and acceptance of Section 408 materials. this manual with the Standard Specifications.

NDDOT and FHWA created this manual. Associated General Contractors reviewed this manual before printing. Notify the Materials and Research Division of any errors or changes in this manual.

100.02 DUTIES AND RESPONSIBILITIES.

Materials and Research Division. The Materials and Research operates the supervision of the Materials and Research Engineer and participates in

the AASHTO Materials Reference Laboratory (AMRL), and the Cement and Concrete Reference Laboratory (CCRL) inspection programs.

State Highway Agency (SHA) is required by (CFR) Code of Federal Regulations Part to maintain an accredited Central Laboratory and to assure that all materials used highway and bridge construction conform to contract

Procedures to this are detailed this manual.

Materials and Research Division is a materials and testing resource. If a materials conflict occurs during project construction, notify Construction and Materials and Research Divisions. Materials and Research make a recommendation to the Construction Division.

Revised 4-97

B. District Materials Coordinator. The District Materials Coordinator is the construction materials specialist within the district and is responsible for proper materials sampling, testing, and specification compliance. The District Materials Coordinator is accountable to the District Engineer but must coordinate activities with the Materials and Research Division. Responsibilities include but are not limited the following:

1. Instruct district personnel in proper sampling and testing procedures. Assure that required field tests are in accordance with proper test procedures (Independent assurance testing).

3. Inspect and approve all field laboratories. 4. Issue and maintain field laboratory and survey equipment. 5. Conduct progress and final sampling, testing, and measu;ements. 6. For all federal-aid projects, prepare the FHWA •s required certification of

quality and quantity of each type of material and submit it to the District Engineer for his signature. Assure that the .. Materials Safety Data Sheet'" for hazardous materials is posted in the field laboratory where they are used.

C. Field laboratory Personnel. Obtain samples, either independently or from the Contractor, of all material requiring testing for quality control or acceptance. Perform tests, document test results, complete paper work, and inform the Project Engineer/Manager of test results. Test as much of the sampled materials in the field laboratory as possible. Perform all work in accordance with procedures set forth in this manual.

D. Consultants. Follow the procedures outlined this manual and directives of the District Engineer. Advice and/or direction is available from the same sources that are open to Department personnel.

Independent laboratories. Perform material testing for the Department using the Department's specifications and testing procedures. Provide certifications of all test results and, on request, allow inspection of the laboratory by representatives of the Department.

100.03 PROCUREMENT OF EQUIPMENT AND SUPPLIES.

office maintains a complete stock of testing equipment, sample containers, forms, and other supplies relating to material quality control. Request supplies from the District Materials Coordinator. To keep district inventory levels at a minimum and yet have ample supply when needed, each Project Engineer/Manager needs to anticipate well in advance and keep Materials Coordinator fully informed.

100.04 SAMPlES AND SAMPUNG.

General. The Project Engineer/Manager approves sampling and testing methods used at project Contract Documents indicate the test method used.

Appendix F contains the required number of district, and Materials and Research tests.

Use field numbers to identify samples submitted to the District and Materials and . Accompany samples submitted District or Materials and Research Division with field sample test results. District Materials Coordinator field test results with from

district laboratory Materials Research report showing the comparison.

Information to Be Submitted with Samples. Sample cards and tag envelopes may be obtained the district office. Appendix D has information on, and examples of, these cards.

When submitting samples, make out a sample card, place it in a tag envelope, seal the envelope, and it securely to the sample. For questions about information required on the sample card, contact the District Laboratory. Report all pit location information by section, township, range, and by the

name. testing on card. Add additional information the back of the card.

C. Packing of Samples. Obtain containers for all materials at any district office through the District Materials Coordinator. Ship all samples in these approved containers. Ship asphalt cements and cutback oils in metal cans. Ship emulsified asphalt in plastic bottles or plastic pails. Securely fasten the lids on all containers used to ship liquid materials to prevent leakage. Mark packages containing these samples .. Liquid Handle with Care... samples of other materials in pails or sacks (i aggregate samples) or boxes (i.e., cores} and securely seal. To prevent injury, keep all shipping containers as light as practicable.

Carefully handle concrete cylinders place them transport vehicle so that they do not touch each other or any other hard object. Separate concrete cylinders by a soft material and load them carefully to avoid damage. Protect concrete cylinders from freezing hot

Authorized

Yield

Cement

Unit of Water

Face

Particles

Thin or Elongated pieces

Fractured Material

Compression Test

Test

Section 101

ABBREVIATIONS & DEFINITIONS

Central lab, District Lab, State Field Lab, approves.

lab the engineer

lb/cu

of samples taken a single, for testing.

manual as feet

surface constituting an area equal to at least % of the largest cross-sectional area particle. A fractured face is caused either by mechanical means or by nature. Natural fractures to be accepted must be similar to fractures produced by a crusher.

coal. Includes clay, soft iron oxide, and other friable material.

Maximum thickness less than 1 the maximum width, or more than three times the maximum

aggregate crushed to a smaller size from a larger size. aggregate retained on a 5k'" to produce aggregate of .. or less size.)

Two Concrete Cylinders cast the same sample.

Concrete Compression tests are cast on the project site and cured for 28 conditions. Average of two cylinders.

on a set under laboratory

Compression tests are on a set cast on the site and 7 days under laboratory conditions. Average of two cylinders.

Section 105

CONTROl OF WORK

The Standard Specification Sections; 1 05 on as it

1 INSPECTION WORK.

the field to accepted by Inspect as soon as possible after

material be defective, regardless of previous

If not used immediately, give approved materials another careful visual Before decide materials

a certification) that have deteriorated or quality.

Section 106

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Section 106 Control of Material

106.01 Description The following NDDOT Standard Specifications for Road and Bridge Construction sections give direction on control of work as it pertains to materials: 106.01, “General Methods of Materials Acceptance;” 106.03, “Samples, Tests, Cited Specifications;” 106.04, “Storage of Materials;” 106.07, “Rights In and Use of Material Found in the Work;” 106.08, “Department-Furnished Material;” and 106.09, “Buy American Products.” The following contains additional information pertaining to materials. 106.02 General Methods

• For each project keep a materials file containing copies of all laboratory tests, field tests, inspection reports, and certifications.

• All sampling and testing is conducted at the frequencies outlined throughout this manual. The specified frequencies are the minimum required for the project. The Engineer may increase sampling and testing at any time to verify the quality of the material.

• To ensure bias is eliminated from the sample selection process, sampling must be from random sample locations. The Engineer may utilize the random number table found in this manual or any other common method they find acceptable.

• At sufficient intervals, check the number of samples submitted to the laboratory, certifications, inspection reports, and number of field tests to be certain all materials used have the required supporting documents.

• SFN 10072, “Aggregate Quality Test Summary” should be posted on the project and used to record the results of all tests performed at an authorized laboratory. At the completion of the project, submit the original copy of this form to the District Materials Coordinator for review, approval, and distribution.

• If the Engineer waives the requirements for sampling and testing, or certification of compliance under the guidelines established in Section 106.01, “General Methods of Materials Acceptance,” of the NDDOT Standard Specifications for Road and Bridge Construction, the materials accepted under these conditions must be listed on SFN 10110, “Project Engineer’s Report on Materials Acceptance.”

• When the Engineer waives the requirements for sampling and testing materials or choses to use non-conforming materials, justification must be attached to SFN

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10110. The justification must include, but may not be limited to, the consultation of the Materials and Research, Design, and Bridge Divisions.

• Specifications require the submittal of shop drawings for specified construction components. Shop drawings are required for some items such as pre-stressed beams, structural steel, lighting, traffic signal components, etc.

• The Contractor submits a minimum of two sets of shop drawings to the Engineer. It is the Engineer’s responsibility to send the drawings with a transmittal letter to the construction office for review and approval. If the project is a non-NDDOT engineered project, send the drawings and transmittal letter to the County or Consultant in charge of the project. Indicate in the transmittal letter if the shop drawings are for a project where a Critical Path Method (CPM) is specified. Components covered by shop drawings do not need certification unless required by specifications or plan notes.

106.03 Independent Assurance Sampling and Testing Program

The Independent Assurance (IA) Sampling and Testing Program is a major element of NDDOT’s Materials Quality Control Program. It is intended to ensure that test data derived from project acceptance testing is reliable by providing an independent check of test results and equipment. The program includes observations of project sampling and testing, split sample testing, equipment checking, and documentation.

The IA program is mandated by the Federal Highway Administration (FHWA). The purpose is to confirm the reliability of the test results obtained in the acceptance sampling and testing program. This is accomplished by observing sampling and testing procedures, as well as obtaining split portions of acceptance samples. Split samples are tested using equipment and testing personnel different from those used for acceptance testing. The test results are then compared to the acceptance test results. If these test results do not correlate, follow-up actions are taken to discover and correct the deficiencies.

The IA will evaluate the sampling and testing personnel and equipment of the NDDOT. The program covers sampling procedures, testing procedures, and testing equipment. The testing equipment will be evaluated by calibration checks, split samples, or proficiency samples. Testing personnel will be evaluated by observation, review of the control charts and documentation, and split samples.

An IA program is required of all states by the FHWA for all federal aid projects. The states develop their own program content using FHWA prescribed guidelines. FHWA concurrence with the IA is necessary before implementation by the state. It is NDDOT policy to apply the program to all federal aid projects, including Local Public Agencies on the NHS system.

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Management of this program is at the District Materials Coordinator level and is the responsibility of the Materials and Research Engineer. All IA is independent of project management activities, however close cooperation between the two is essential. It is also particularly important that project personnel appreciate the importance of the IA and cooperate fully to accomplish its intended purpose.

The specific guidelines relative to the sampling and testing undertaken in this program are not described here. All areas requiring IA are designated throughout this manual.


SECTION 200

EARTHWORK

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Section 203 Excavation and Embankment 203.01 Description 203.02 Excavation 203.03 Embankment – Acceptance Samples and Tests 203.04 Independent Assurance (IA) Samples and Tests Section 210 Structural and Channel Excavation, Foundation Fill and Preparation 210.01 Description 210.02 Excavation 210.03 Acceptance Samples and Tests 210.04 Independent Assurance (IA) Samples and Tests Section 230 Reshaping Roadway and Subgrade Preparation 230 Description 230.1 Acceptance Samples and Tests 230.2 Independent Assurance Samples and Tests Section 234 Stabilized Subgrade 234 Description 234.1 Acceptance Samples and Tests 234.2 Independent Assurance Samples and Tests Appendix 200-A Consultant Use of Nuclear Gauges for Compaction Control Reference Forms: DOT 13942 Conversion Chart for Speedy Tester SFN 2454 Density Test Worksheet – Volume Measure SFN 9987 Aggregate Sample Worksheet SFN 10063 Moisture-Density Relationship Tests SFN 59724 Sand Cone Correction Factor SFN 59725 Density Test Worksheet – Sand Cone Method All test procedures used within and referred to in this section can be found under “Testing Procedures” of this manual. Form examples at end of section are for “Reference Only.” Use the most current available forms on the NDDOT website only.

Section 203

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Section 203 Excavation and Embankment

203.01 Description.

This work consists of the excavation, haul, placement, disposal, and compaction of embankment material.

203.02 Excavation. No testing required. 203.03 Embankment – Acceptance Samples and Tests.

A. Engineer Responsibility.

The Engineer will collect material and conduct testing to verify the material meets the requirements of ‘Compaction Control’ in Section 203.04.E.2 of the NDDOT Standard Specifications for Road and Bridge Construction.

1. Compaction Control, Type A.

Table 203-1 shows test method and frequency for embankment compaction control.

Table 203-1

Test Frequency ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

1 compaction curve for each change in soil.

ND D 2167, “Density and Unit Weight of Soil in Place by the Rubber Balloon Method,” or ND T 191, “Density of Soil In-Place by the Sand Cone Method”

1 test per 1,500 feet of compacted roadway per 12” lift.

ND T 265, “Laboratory Determination of Moisture Content of Soils;” or ND T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Tester (Speedy);” or ND D 4643, “Microwave Method of Drying Soils”

1 test per 1,500 feet of compacted roadway per 12” lift.

Sample locations will be randomly selected by the Engineer.

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The results of the in-place density and moisture tests are compared to the appropriate moisture density curve derived from the ND T 180 or ND T 99 testing. Compute the ND T 180 or ND T 99 on SFN 10063, “Moisture-Density Relationship Tests” worksheet. The in-place density and moisture tests are recorded on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method.”

2. Compaction Control, Type B.

No testing required.

3. Compaction Control, Type C.


B. District Materials Coordinator Responsibility. Reserved.

C. Materials and Research Responsibility.

Reserved.

203.04 Independent Assurance (IA) Samples and Tests.

A. Engineer Responsibility. Conduct IA tests on split samples taken by the District Materials Coordinator. Testing performed will be as directed by the District Materials Coordinator.

B. District Materials Coordinator Responsibility.

The District Materials Coordinator will obtain these samples and conduct these tests. Soils or soil-aggregates tested for moisture-density relations will be an equal split sample from the Engineer. In-field IA testing will be conducted next to the field test using the same method. Table 203-2 shows test method and frequency for embankment compaction control, Type A, for IA.

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Table 203-2 Test Frequency ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

1 compaction curve for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.


1 density test for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.

ND T 265, “Laboratory Determination of Moisture Content of Soils,” or ND T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Tester (Speedy),” or ND D 4643, “Microwave Method of Drying Soils”

1 moisture test for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.

Compute the ND T 180 or ND T 99 on SFN 10063, “Moisture-Density Relationship Tests” worksheet. The in-place density and moisture tests are recorded on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method.”

Engineer and District Materials Coordinator will compare the test results for IA tolerance in Table 203-3.

Table 203-3

Test Tolerance ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

± 4 lbs. cu. ft. (MDD) ± 1.5 (OM)


± 5 lbs. cu. ft.

ND T 265, “Laboratory Determination of Moisture Content of Soils,” or ND T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Tester (Speedy),” or ND D 4643, “Microwave Method of Drying Soils”

± 2.0

Section 203

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If the initial IA testing is not within specified tolerances, the Engineer shall obtain an additional sample for testing under the observation of the District Materials Coordinator.

The Engineer and District Materials Coordinator shall conduct equipment checks and review testing procedures. This will continue until the differences are resolved.


Reserved.

Section 210

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Section 210 Structural and Channel Excavation, Foundation Fill and Preparation

210.01 Description.

This work consists of excavation as defined in the plans.

210.02 Excavation.


210.03 Acceptance Samples and Tests.


The Engineer will collect material and conduct testing to verify materialmeets the requirements of Section 210.03.B and 714.04.A.7, 8 of theNDDOT Standard Specifications for Road and Bridge Construction.

Table 210-1 shows test methods and frequency for compaction control.

Table 210-1 Tests Frequency ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

1 compaction curve for each change in material.


1 test per 1 foot in elevation.

ND T 265, “Laboratory Determination of Moisture Content of Soils,” or ND T 217, “Determination of Moisture in Soil by Mean of Calcium Carbide Gas Pressure Tester (Speedy),” or ND D 4643, “Microwave Method of Drying Soils”

1 test per 1 foot in elevation.

Sample locations will be randomly selected by the Engineer.

The results of the in-place density and moisture tests are compared to the appropriate moisture density curve derived from the ND T 180 or ND T 99 testing.

Compute the ND T 180 or ND T 99 on SFN 10063, “Moisture-Density Relationship Tests” worksheet. The in-place density and moisture tests are

Section 210

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recorded on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method.” Table 210-2 shows test method and frequency for aggregate placed.

Table 210-2

Test Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”

1 test result per 2,500 C.Y.

ND T 11, “Materials Finer Than No. 200 Sieve in Mineral Aggregates by Washing”


NDDOT 4, “Percentage of Fracture Particles in Coarse Aggregate”


ND T 113, “Lightweight Pieces in Aggregate” 1 test result per 2,500 C.Y.

Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet.” Results are recorded on SFN 10072, “Aggregate Quality Test Summary.”


Reserved.


Reserved.

210.04 Independent Assurance (IA) Samples and Tests.


Conduct IA tests on split samples taken by the District Materials Coordinator. Testing performed will be as directed by the District Materials Coordinator.

B. District Materials Coordinator Responsibility. The District Materials Coordinator will obtain these samples and conduct these tests. These samples will be an equal split sample from the Engineer.

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Samples will be obtained and split according to ND T 2, “Sampling of Aggregates,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” Soils or soil-aggregates tested for moisture-density relations will be an equal split sample from the Engineer. In-field IA testing will be conducted next to the field test, using the same method. Table 210-3 shows test method and frequency for IA.

Table 210-3

Test Frequency ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

1 compaction curve for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.


1 density test for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.


1 moisture test for each three miles of roadway, or a minimum of 1 test per 200,000 C.Y.

ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”

Minimum 1 test result per project.





ND T 113, “Lightweight Pieces in Aggregate” Minimum 1 test result per project.

Compute the ND T 180 or ND T 99 on SFN 10063, “Moisture-Density Relationship Tests” worksheet. The in-place density and moisture tests are recorded on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method.” The Engineer and District Materials Coordinator will compare the test results for IA tolerance in Table 210-4.

Section 210

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Table 210-4

Test Tolerance ND T 180 or ND T 99, “Moisture-Density Relations of Soils (Multi-Point)”

± 4 lbs. cu. ft. (MDD) ± 1.5 (OM)


± 5 lbs. cu. ft.


± 2.0

ND T 27, “Sieve Analysis of Fine and Coarse Aggregates,” and ND T 11, “Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing”: No. 4 sieve and larger No. 30 sieve No. 200 sieve

±5 ±3 ±2


±5

ND T 113, “Lightweight Pieces in Aggregate” ±2

If the initial IA testing is not within specified tolerances, the Engineer shall obtain an additional sample for testing under the observation of the District Materials Coordinator.

The Engineer and District Materials Coordinator shall conduct equipment checks and review testing procedures. This will continue until the differences are resolved.


Reserved.

Revised 1/24/2012 230

230 1

SECTION 230

RESHAPING ROADWAY AND SUBGRADE PREPARATION

230 DESCRIPTION

This work consists of scarifying, shaping, compacting, and maintaining the subgrade, or reshaping an existing roadway before constructing a base, or surface course.

230.1 ACCEPTANCE SAMPLES AND TESTS

Field Laboratory Testing: The Engineer or Representative conducts a minimum of one moisture and density test for each compacted lift per 1500 feet of roadway. Conduct moisture test according to AASHTO T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Moisture Tester (Speedy).”* Conduct the density test according to ASTM D 2167, “Density and Unit Weight of Soil in Place by the Rubber-Balloon Method,” or AASHTO T 191, “Density of Soil In-Place by Sand-Cone Method.” Record information on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method.” Conduct additional tests at locations as directed by the Engineer or Representative.

If work consists of embankment widening, then testing shall be conducted on each side of roadway or embankment that is widened. Each widened portion shall be considered a separate roadway.

230.2 INDEPENDENT ASSURANCE (IA) SAMPLES AND TESTS

District Laboratory Testing: The District Materials Coordinator or Representative conducts a minimum of one moisture and density test, including a proctor test, for each three miles of roadway. Conduct these tests according to AASHTO T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Moisture Tester (Speedy),”* ASTM D 2167, “Density and Unit Weight of Soil in Place by the Rubber-Balloon Method,” or AASHTO T 191, “Density of Soil In-Place by Sand-Cone Method,” and AASHTO T 99 or T 180, “Moisture-Density Relations of Soils.” Record information on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method,” and SFN 10063, “Moisture-Density Relationship Test.”

For Type C subgrade preparation, perform proctor tests for each soil change encountered with a minimum of one test for every three miles of roadway.

Frequency of testing shall not differ when conducting embankment widening.

Revised 1/24/2012 230

230 2

∗ Field applications typically require the use of the “Speedy” to determine soils moisture content, but it may be practical to use AASHTO T 265, “Laboratory Determination of Moisture Content,” or ASTM D 4643, “Microwave Method of Drying Soils,” in its place. However, acceptance testing and Independent Assurance (IA) testing must be completed using the same soils moisture determination method.

Materials and Research Division Testing: No specified number of tests is required. The Materials and Research Division will perform moisture-density relationship tests according to AASHTO T 99 or T 180, “Moisture-Density Relations of Soils,” if requested to do so by the District Materials Coordinator.

Revised 1/24/2012 234

230 1

SECTION 234

STABILIZED SUBGRADE 234 DESCRIPTION

This work consists of treating the top layer of subgrade with lime or lime-fly ash.

234.1 ACCEPTANCE SAMPLES AND TESTS

Field Laboratory Testing: The Engineer or Representative conducts moisture-density relationship tests for all soil types encountered on the project after the complete mixing of the lime and/or fly ash with the soil.

Conduct a minimum of one moisture and density test for every 1500 feet, or fraction thereof. Perform the moisture-density relationship tests, proctor, and all related density tests on the same day.

The Engineer or Representative conducts a minimum of one moisture and one density test, including a proctor test, for every 1500 feet of roadway. Conduct tests according to AASHTO T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Moisture Tester (Speedy),”* ASTM D 2167, “Density and Unit Weight of Soil in Place by the Rubber-Balloon Method,” or AASHTO T 191, “Density of Soil In-Place by Sand-Cone Method,” and AASHTO T 99 or T 180, “Moisture-Density Relations of Soils.” Record information on SFN 2454, “Density Test Worksheet – Volume Measure,” or SFN 59725, “Density Test Worksheet – Sand Cone Method,” and SFN 10063, “Moisture-Density Relationship Tests.”

234.2 INDEPENDENT ASSURANCE (IA) SAMPLES AND TESTS

District Laboratory Testing: The District Materials Coordinator or Representative conducts a minimum of one moisture and density test, including a proctor test, for each three miles of roadway. Stagger the test locations on a four-lane facility. Complete the proctor and density tests on the same day. Conduct tests according to AASHTO T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Moisture Tester (Speedy),”* ASTM D 2167, “Density and Unit Weight of Soil in Place by the Rubber-Balloon Method,” or AASHTO T 191, “Density of Soil In-Place by Sand-Cone Method,” and AASHTO T 99 or T 180, “Moisture-Density Relations of Soils.” Record the information on SFN 2454, “Density Test Worksheet - Volume Measure,” or SFN 59725, “Density Test Worksheet - Sand Cone Method,” and SFN 10063, “Moisture-Density Relationship Test.”

Revised 1/24/2012 234

234 2

The District Materials Coordinator or Representative performs one random width and depth check for each two miles of roadway, or fraction thereof. Record results on SFN 13889, “Project Records Samples/Tests Reports.” If an NHS system project, submit a copy of SFN 13889, “Project Records Samples/Test Reports,” to the FHWA at the completion of the project.

∗ Field applications typically require the use of the “Speedy” to determine soils moisture content, but it may be practical to use AASHTO T 265, “Laboratory Determination of Moisture Content,” or ASTM D 4643, “Microwave Method of Drying Soils,” in its place. However, acceptance testing and Independent Assurance (IA) testing must be completed using the same soils moisture determination method.

APPENDIX 200-A

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CONSULTANT USE OF NUCLEAR GAUGES FOR COMPACTION CONTROL 1. General Requirements Consulting firms may use nuclear gauges under the following conditions: • The use of the gauges shall be limited to soil and aggregate density testing only.

Testing must be conducted according to AASHTO T 310, “In-Place Density and Moisture Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).”

• The firm providing the testing maintains accreditation under the AASHTO Accreditation

Program (AAP).

o Included in the scope must be AASHTO Standard R18, “Establishing and Implementing a Quality System for Construction Materials Laboratories,” and AASHTO Test Method T 310, “In-Place Density and Moisture Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth).”

o The firm providing the testing shall provide calibration data for the nuclear gauges

they are using. The nuclear gauges are to be calibrated according to Annex A1, A2, and A3 of AASHTO T 310.

• Nuclear gauges contain radioactive materials. Users must follow all applicable safety

regulations and protocol required by the North Dakota State Health Department. 2. Correlation Requirements • A series of five (5) side-by-side comparisons shall be conducted at the beginning of

each project on a location determined by the Engineer. • The data acquired from each gauge will be correlated to conventional methods of

determining dry density on the same materials tested on the project. The conventional density tests are the following:

In-Place Density Tests: ND D 2167, “Density and Unit Weight of Soil In-Place by the Rubber Balloon Method” ND T 191, “Density of Soil In-Place by the Sand Cone Method”

APPENDIX 200-A

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In-Place Moisture Tests: ND T 265, “Laboratory Determination of Moisture Content of Soils” ND T 217, “Determination of Moisture in Soil by Means of Calcium Carbide Gas Pressure Tester (Speedy)” ND D 4643, “Microwave Method of Drying Soils”

• Personnel conducting the nuclear density testing must also conduct the comparison

testing in the field. These personnel must also be certified to provide conventional density and moisture testing according to NDDOT Standard Specification for Road and Bridge Construction Section 106.10.

• All correlation results are provided to the Engineer within 24 hours of the completion of

the testing. • The average of the moisture content tests shall be compared to the nuclear gauge

results. If the average differentiates by less than 1.0% or 1.0 lbs./cu.ft., the nuclear gauge is used without correction.

• If the gauge results differ by more than 1.0%, a correction factor will be applied. If the

in-place wet density results differ by more than 1.0 lbs./cu.ft., a correction will be applied.

3. Validation of Results • This correlation will be verified in the field with a single test for every ten (10) nuclear

gauge tests for the first 30 tests. Testing can be reduced to a single validation test per 50 nuclear gauge tests thereafter.

• If a correction factor has been applied and the verification differentiates by over 0.5% or 0.5 lbs./cu.ft., a new correction factor shall be established as previously described in Section 2. Correlation testing would also revert to a single test for every ten (10) nuclear gauge tests for the first 30 tests.

4. Independent Assurance (IA) • Independent assurance is required and conducted using the conventional in-place

density methods used for the comparison testing. • The District Materials Coordinator directs frequency and testing of the IA.

SECTION 200

FORMS


SECTION 300

BASES

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SECTION 302 AGGREGATE BASE AND SURFACE COURSE 302.01 Description 302.02 Acceptance Samples and Tests 302.03 Independent Assurance (IA) Testing SECTION 306 FULL DEPTH RECLAMATION 306.01 Description 306.02 Acceptance Samples and Tests 306.03 Independent Assurance (IA) Testing FORMS SFN 9987 Aggregate Sample Worksheet SFN 10072 Aggregate Quality Tests Summary SFN 14388 Price Adjustment Worksheet All test procedures used within and referred to in this section can be found under “Testing Procedures” of this manual. Form examples at end of section are for “Reference Only.” Use the most current available forms found on the NDDOT website.

Section 302

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Section 302 Aggregate Base and Surface Course

302.01 Description. This work consists of furnishing and placing aggregate or salvaged material on a prepared foundation.

302.02 Acceptance Samples and Tests. A. Engineer Responsibility.

The Engineer will collect material and conduct testing to verify the material meets the requirements in Section 816 and 817 of the NDDOT Standard Specifications for Road and Bridge Construction.

Obtain and split aggregate samples according to ND T 2, “Sampling of Aggregates,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” Table 302-1 shows test methods and test frequency.

Table 302-1 Tests Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”

*1 test result per lot



*Definition of a lot: • One day’s production, if that day’s production is greater than 1,000 tons; • As many days’ production as necessary to reach 1,000 tons (a day’s production will not be

split into multiple lots); or • The plan quantity, if plan quantity is less than 1,000 tons.

Table 302-2 shows test methods and test frequency for fractured particles and lightweight pieces of aggregate.

Table 302-2 Tests Frequency NDDOT 4, “Percentage of Fracture Particles in Coarse Aggregate”

*1 test result per 10,000 ton lot

ND T 113, Lightweight Pieces in Aggregate” *1 test result per 10,000 ton lot

*Definition of a lot: • If a fractional lot is less than 2,500 tons, it will be included in the previous lot. • If fractional lot is greater than 2,500 ton but less than 10,000 ton, it will be considered a new lot.

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For Tables 302-1 and 302-2 obtain three random samples for each lot of material placed at a location determined by the Engineer. Test each sample and determine acceptance based on the average of the three tests.

If the results of each sample are within the specified range, collect three samples from the next lot produced and test one of the samples. If the test result is within the specified range, the Engineer will accept the material.

If the test result is outside of the specified range, test the remaining two samples and determine acceptance based on the average of the three test results. When the average of three test results is needed to determine acceptance, continue to test three samples for each lot produced. Return to testing a single sample only after all three sample test results are within the specified range.

Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet” and record on SFN 10072, “Aggregate Quality Test Summary.”


The District Materials Coordinator will obtain a sample. Table 302-3 shows test methods and test frequency. This test is required for Class 5 only.

Table 302-3

Tests Frequency ND T 90, “Determining the Plasticity Limit and Plasticity Index of Soils” (Acceptance Test)


C. Materials and Research Division Responsibility.

During the beginning of aggregate stockpiling, the Engineer obtains one composite aggregate sample and submits it to Materials and Research for L.A. Abrasion testing.

Table 302-4 shows test methods and test frequency.

Table 302-4

Tests Frequency ND T 96, “Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

*1 test result per project.

*If the aggregate source has been tested previously by the Department and the material is within the allowable limits, the test for L.A. Abrasion will not be required.

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302.03 Independent Assurance (IA) Testing. A. Engineer Responsibility.

Perform IA tests on split samples taken by the District Materials Coordinator. Testing performed will be as directed by the District Materials Coordinator.


The District Materials Coordinator will obtain these samples and perform these tests. These samples will be an equal split sample with the Engineer.

Obtain and split samples according to ND T 2, “Sampling of Aggregates,” and ND T 248 “Reducing Samples of Aggregate to Testing Size.” Table 302-5 shows test methods and test frequency.


1 test result per 30,000 tons. Minimum 1 per project.





ND T 113, “Lightweight Pieces in Aggregate” 1 test result per 30,000 tons. Minimum 1 per project.

The District Materials Coordinator and the Engineer will compare the test results for IA tolerances in Table 302-6.

Table 302-6

Tests Tolerance ND T 27, “Sieve Analysis of Fine and Coarse Aggregates,” and ND T 11, “Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing”:

• No. 4 sieve and larger • No. 30 sieve • No. 200 sieve

±5 ±3 ±2


±5

ND T 113, “Lightweight Pieces in Aggregate” ±2

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If the IA testing is not within specified tolerances, the Engineer will obtain an additional sample for testing under the observation of the District Materials Coordinator.

The Engineer and District Materials Coordinator will examine equipment used and review test procedures until the differences are resolved.


The District Materials Coordinator will obtain and equally split this sample with Materials and Research. Table 302-7 shows methods and IA test frequency for plastic limit and plasticity index of soils.

Table 302-7 Tests Frequency ND T 90, “Determining the Plastic Limit and Plasticity Index of Soils” (IA)

A minimum of 2 test results per construction season for each district.

Table 302-8 shows the specified tolerance for plastic limit and plasticity index test results.

Table 302-8

Tests Tolerance ND T 90, “Determining the Plastic Limit and Plasticity Index of Soils” (IA)

±2

If the IA testing is not within specified tolerance, the District Materials Coordinator will obtain an additional sample for testing and split equally with Materials and Research. The District Materials Coordinator and Materials and Research will examine equipment used and review test procedures until the differences are resolved.

302.04 Materials and Research Division Program Oversight.

The District Materials Coordinator will obtain and equally split this sample. The first half of the sample is retained and tested by the District Materials Coordinator. The second half of the sample along with test results will be submitted to Materials and Research.

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Table 302-9 shows test methods and testing frequency of sample testing.

Table 302-9 Test Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates” ND T 11, “Materials Finer Than No. 200 Sieve in Mineral Aggregates by Washing” NDDOT 4, “Percentage of Fracture Particles in Coarse Aggregate” ND T 113, “Lightweight Pieces in Aggregate”

1 test result per project. Not required if quantities

Section 306

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Section 306 Full Depth Reclamation

306.01 Description This work consists of creating a uniform base through the blending of virgin aggregate with existing bituminous surfacing, aggregate base, or both. 306.02 Acceptance Samples and Tests. A. Engineer Responsibility.

The Engineer will collect material and conduct testing to verify that it meets the requirements of Class 3M in Section 816 of the NDDOT Standard Specifications for Road and Bridge Construction. Obtain and split samples according to ND T 2, “Sampling of Aggregates,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” 1. Virgin Aggregate:

Table 306-1 shows test methods and test frequency of virgin aggregate produced.

Table 306-1

Tests Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”


ND T 11, “Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing”


*Definition of a lot: • One day’s production, if that day’s production is greater than 1,000 tons; • As many days’ production as necessary to reach 1,000 tons (a day’s production

will not be split into multiple lots); or • Plan quantity, if plan quantity is less than 1,000 tons.

Table 306-2 shows test methods and test frequency to determine lightweight pieces of the virgin aggregate.

Table 306-2

Tests Frequency ND T 113, “Lightweight Pieces in Aggregate”

1 test result per 10,000 ton lot

Definition of a lot • If a fractional lot is less than 2,500 tons, it will be included in the previous lot. • If fractional lot is greater than 2,500 ton but less than 10,000 it will be considered a new lot.

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For Table 306-1 and 306-2 obtain three random aggregate samples for each lot of aggregate produced. Test all samples from the initial lot and determine acceptance of the lot based on the average of the three tests. If all three samples from the initial lot are within the specified range, collect three samples from the next lot produced and test one of the samples. If the test result is within the specified range, the Engineer will accept the lot.

If the test result is outside of the specified range, test the remaining two samples and determine acceptance of the lot based on the average of the three test results. When the average of three test results is needed to determine acceptance of a lot, continue to test three samples for each lot of aggregate. Return to testing a single sample only after all three samples are within the specified range. Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet,” and record on SFN 10072, “Aggregate Quality Test Summary.” If there are failing test results submit SFN 14388, “Price Adjustment Worksheet.”

2. Blended Material The Engineer will randomly collect and conduct this testing to verify that it meets the requirements of blended material found in Section 306.03 in NDDOT Standard Specifications for Road and Bridge Construction.

Obtain and split samples according to ND T 2, “Sampling of Aggregates,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” Table 306-3 shows test methods and test frequency of blended aggregate placed.

Table 306-3

Tests Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”

2 test results per mile

When the blending process begins, the blended material is sampled and tested a minimum of two times per day. When the Engineer is satisfied the Contractor is producing blended material within the specified limits, random tests will be taken as determined by the Engineer to assure compliance. Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet,” and record on SFN 10072, “Aggregate Quality Test Summary.”

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If the Engineer determines in the field 100% of the blended material passes, no additional lab testing is required.


The District Materials Coordinator will obtain a sample. Table 306-4 shows methods and test frequency. This test is required for Class 5 only.

Table 306-4

Tests Frequency ND T 90, “Determining the Plasticity Limit and Plasticity Index of Soils” (Acceptance Test)



During the beginning of aggregate stockpiling, the Engineer obtains one composite aggregate sample and submits it to Materials and Research for L.A. Abrasion testing. Table 306-5 shows test methods and frequency.

Table 306-5

Tests Frequency ND T 96, “Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine


*If the aggregate source has been tested previously by the Department and the material is within the allowable limits, the test for L.A. Abrasion will not be required.

306.03 Independent Assurance (IA) Testing A. Engineer Responsibility

Perform IA tests on split samples taken by the District Materials Coordinator. Tests performed will be as directed by the District Materials Coordinator.

B. District Materials Coordinator Responsibility

The District Materials Coordinator will obtain these samples and perform these tests. These samples will be an equal split with the Engineer. Obtain and split samples according to ND T 2, “Sampling of Aggregates,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.”

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Table 306-6 shows test methods and frequency for virgin aggregate IA samples.


1 test result per 30,000 tons. Minimum 1 per project

ND T 11, “Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing”


ND T 113, “Lightweight Pieces in Aggregate”


ND T 27, “Sieve Analysis of Fine and Coarse Aggregates” Blended Material

Minimum 1 test result per project

Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet,” and record on SFN 10072, “Aggregate Quality Test Summary.” The Engineer and District Materials Coordinator will compare the test results for IA tolerance in Table 306-7.

Table 306-7

Test Tolerance ND T 27, “Sieve Analysis of Fine and Coarse Aggregates,” and ND T 11, “Materials Finer than No. 200 Sieve in Mineral Aggregates by Washing”

• No. 4 sieve or larger ±5 • No. 30 sieve ±3 • No. 200 sieve ±2

ND T 113, Lightweight Pieces in Aggregate ±2

If the IA testing is not within specified tolerances, the Engineer will obtain an additional sample for testing under the observation of the District Materials Coordinator.

The Engineer and District Materials Coordinator will examine equipment used and review test procedures until the differences are resolved.


The District Materials Coordinator will obtain and equally split this sample with Materials and Research.

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Table 306-8 shows test method and frequency for IA testing for plastic limit and plasticity index of soils.

Table 306-8 Tests Frequency ND T 90, “Determining the Plastic Limit and Plasticity Index of Soils” (IA)

Minimum 1 test per project

Table 306-9 shows the specified tolerance for test results of plastic limit and plasticity index.

Table 306-9

Test Tolerance ND T 90, “Determining the Plastic Limit and Plasticity Index of Soils” (IA)

±2

SECTION 300 FORMS

Section 400

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SECTION 400

BITMINOUS PAVEMENTS

Table of Contents - 400

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TABLE OF CONTENTS

Section 401 Prime, Tack, or Fog Coat 401.01 Description 401.02 Acceptance Samples and Tests 401.03 Independent Assurance (IA) Samples and Tests Section 411 Milling Pavement Surface 411.01 Description 411.02 Acceptance Samples and Tests Section 420 Bituminous Seal Coat 420.01 Description 420.02 Acceptance Samples and Tests with a Field Laboratory 420.03 Independent Assurance (IA) Samples and Tests with a Field Laboratory 420.04 Acceptance Samples and Tests without a Field Laboratory 420.05 Independent Assurance (IA) Samples and Tests without a Field Laboratory Section 421 Micro Surfacing 421.01 Description 421.02 Acceptance Sampling and Testing During Stockpiling 421.03 Acceptance Sampling and Testing During Mix Production 421.04 Independent Assurance (IA) Samples and Tests Section 422 Slurry Seal 422.01 Description 422.02 Acceptance Sampling and Testing During Stockpiling 422.03 Acceptance Sampling and Testing During Mix Production 422.04 Independent Assurance (IA) Samples and Tests Section 430 Hot Mix Asphalt (HMA) Sampling and Testing Requirements 430.01 Description 430.02 Quality Control Testing 430.03 Quality Assurance Testing 430.04 Dispute Resolution 430.05 Independent Assurance (IA) Testing 430.06 Material and Research Division Program Oversight

Table of Contents - 400

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Appendix 400-A Acceptance of Performance Graded (PG) Asphalt for CountyProjects with Federal Aid

Reference Forms:

SFN 2199 Fine Aggregate Specific Gravity WorksheetSFN 9987 Aggregate Sample WorksheetSFN 10071 Compaction ControlSFN 10072 Aggregate Quality Tests SummarySFN 10081 Coarse Aggregate Specific Gravity WorksheetSFN 50289 Maximum Density WorksheetSFN 51700 Flat or Elongated Particles in Coarse AggregateSFN 51701 Uncompacted Void Content of Fine AggregateSFN 51730 Sand Equivalent of Fine AggregateSFN 59132 Density Pay Factor

All test procedures used within and referred to in this section can be found under“Testing Procedures” of this manual.

Form examples at end of section are for “Reference Only.” Use the most current available forms found on the NDDOT website.

Section 401

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Section 401 Prime, Tack, or Fog Coat

401.01 Description.

This work consists of treating a surface with cut-back or emulsified asphalt material.

401.02 Acceptance Samples and Tests.


Bitumen:

Under the observation of the Engineer, the Contractor will obtain a sample, which istwo containers, of bitumen from each load delivered to the project followingNDDOT 1, “Sampling of Bituminous Materials.”

For emulsion samples received from the Contractor, the Engineer will submit allsamples to the District Materials Coordinator.

For cutback asphalt samples received from the Contractor, the Engineer will submitone container sample to Materials and Research and retain one container as acheck.

Aggregate:

The Engineer will obtain and split aggregate samples according to ND T 2,“Sampling of Aggregate,” and ND T 248, “Reducing Samples of Aggregate toTesting Size.”

The Engineer will obtain these samples from material placed in a stockpile ormaterial delivered directly to the project. Table 401-1 shows test method andfrequency for aggregate testing.

Table 401-1 Test Frequency ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”

1 test result per 5 miles or fraction thereof.



Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet.” Results are recorded on SFN 10072, “Aggregate Quality Test Summary.”

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Water:

Obtain one sample per water source according to Section 812 of the NDDOT Standard Specifications for Road and Bridge Construction and submit to Materials and Research.


For emulsified asphalt samples, the District Materials Coordinator will test for sieve and viscosity only, according to tests listed in AASHTO T 59, “Emulsified Asphalts.” The sieve and viscosity tests may be waived if the Engineer determines there is not a consistency problem with the emulsion.

Testing frequency for emulsion testing is the first truck load delivered to the project and then one random sample from the next four trucks delivered. The testing frequency then goes to two random samples from each additional five truck lot, or fraction of a five truck lot.


For emulsified asphalts, Materials and Research tests the random sample from both halves of the project. If the samples pass, the entire project is accepted with no further testing. If one sample passes from either half of the project, then that half is accepted with no further testing. If one sample fails, then all samples from that half of the project are submitted to Materials and Research for testing. Materials and Research will inform the District when sample submittal is required due to failing tests. Materials and Research will then test samples around the one that does not pass to determine a failing lot size. For example, using Table 401-2 below there are four loads of emulsion delivered during the first half of a project and five loads for the second half of the project:

Table 401-2 First Half of Project

Sample 1 Sample 2 Sample 3 Sample 4 Second Half of Project

Sample 5 Sample 6 Sample 7 Sample 8 Sample 9 • The District submits Sample 3 and Sample 7. Sample 3 from the first half

passes and all material from the first half is accepted with no further testing.

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• Sample 7 from the second half fails so Materials and Research will test Samples 6 and 8. If Sample 6 passes, Sample 5 is accepted with no further testing.

• If Sample 8 fails, Sample 9 is tested. If Sample 9 passes, the failing lot size is

made up of loads 7 and 8.

Perform testing on all cutback asphalt samples, submitted by the Engineer, according to Section 818 of the NDDOT Standard Specifications for Road and Bridge Construction.

Test submitted water samples according to the requirements of Section 812 of the NDDOT Standard Specifications for Road and Bridge Construction.

401.03 Independent Assurance (IA) Samples and Tests. A. Engineer Responsibility.

Reserved.


Bitumen:

For all emulsions, one sample is randomly selected from each of the first and second halves of the project and sent to Materials and Research.

Samples should be submitted in a timely manner because there is a time frame in which testing can be done. Aggregate: The District Materials Coordinator will obtain and split samples according to ND T 2, “Sampling of Aggregate,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” The District Materials Coordinator will obtain these samples from material placed in a stockpile or material delivered directly to the project. Table 401-3 shows the test method and frequency for aggregate produced.





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Table 401-4 shows the allowable tolerances between the IA and acceptance samples.

Table 401-4 Test Tolerance ND T 11, Materials Finer Than No. 200 Sieve in Mineral Aggregates by Washing, ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”:

5/8 inch sieve ±7% No. 4 sieve ±7% No. 200 sieve ±2.5%


Bitumen: Tests and frequency for IA for viscosity and sieve are shown in Table 401-5.

Table 401-5 Test Frequency AASHTO T 59, “Emulsified Asphalts” 2 test results per project.

Tolerance between IA and acceptance tests are in Table 401-6.

Table 401-6

Test Tolerance AASHTO T 59, “Emulsified Asphalts”: Sieve ±0.08%

Viscosity 25º C ±15% 50º C ± 21%

If the IA testing is not within specified tolerances, the District Materials Coordinator obtains an additional sample for testing. The District Materials Coordinator and Materials and Research personnel will examine equipment used and review testing procedures. This will continue until the differences are resolved.

Section 411

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Section 411 Milling Pavement Surface

411.01 Description

This work consists of milling pavement surface.

411.02 Acceptance Samples and Tests

Sampling and testing not required.

Section 420

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Section 420 Bituminous Seal Coat

420.01 Description.

This work consists of an application of bitumen followed by an application of cover coat material on a prepared surface.

420.02 Acceptance Samples and Tests with a Field Laboratory.


Bitumen:



Aggregate:

The Engineer shall obtain three random samples from each lot of cover coat materialfor testing. Obtain and split aggregate samples according to ND T 2, “Sampling ofAggregate” and ND T 248, “Reducing Samples of Aggregate to Testing Size.” Table420-1 shows test method and frequency.


*1 test result per lot.


*1 test result per lot.

*Definition of a lot:• 1,200 tons of material.• Plan quantity, if plan quantity is less than 1,200 tons.• If final lot is less than 600 tons include it in the previous lot.• If final lot is greater than 600 tons it is a separate lot.• Lots continue from day to day. Each day does not start a new lot.

Test all samples from the lot and determine acceptance of the lot based on the average of the tests.

Obtain one sample of blotter material for every five miles or fraction thereof. Obtain these samples from material placed in a stockpile or material delivered directly to the project. Table 420-1 above lists the tests to be conducted.

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Compute the sieve analysis on SFN 9987, “Aggregate Sample Worksheet.” Results are recorded on SFN 10072, “Aggregate Quality Test Summary.”

Submit an aggregate sample to the Materials and Research Division for L.A. Abrasion according to AASHTO T 96.


Bitumen:

The District Materials Coordinator will test the emulsified asphalt samples for sieveand viscosity according to ND T 59 and ND T 72.

The sieve and viscosity tests may be waived if the Engineer determines there is nota consistency problem with the emulsion.

For all emulsions, one sample is randomly selected from the first and second halvesof the project and sent to the Materials and Research Division for testing.

Aggregate:

Table 420-2 shows test method and frequency.

Table 420-2 Test Frequency ND T 113, “Lightweight Pieces of Aggregate” *1 test result per lot.

*Definition of a lot:• Lot is every 10 miles or fraction thereof.


Bitumen:

Materials and Research tests the random sample from both halves of the project. Ifthe samples pass, the entire project is accepted with no further testing.

If one sample passes from either half of the project, then that half is accepted withno further testing.

If one sample fails, then all samples from that half of the project are submitted toMaterials and Research for testing.

Materials and Research will inform the District when sample submittal is requireddue to failing tests.

Materials and Research will then test samples around the one that does not pass todetermine a failing lot size. For example, using Table 420-3 there are four loads of

mnilungaLine

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emulsion delivered during the first half of a project and five loads for the second half of the project.

Table 420-3 First Half of Project

Sample 1 Sample 2 Sample 3 Sample 4 Second Half of Project

Sample 5 Sample 6 Sample 7 Sample 8 Sample 9

• The District submits Sample 3 and Sample 7. Sample 3 from the first halfpasses and all material from the first half is accepted with no further testing.

• Sample 7 from the second half fails so Materials and Research will test Samples6 and 8. If Sample 6 passes, Sample 5 is accepted with no further testing.

• If Sample 8 fails, Sample 9 is tested. If Sample 9 passes, the failing lot size ismade up of loads 7 and 8.

Aggregate:

Perform L.A. Abrasion, AASHTO T 96, on a sample obtained during aggregate production.


Table 420-4 Test Frequency AASHTO T 96, “Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine”


*If the aggregate source has been tested previously by the Department and the material is within allowablelimits, the test for L.A. Abrasion will not be required.

420.03 Independent Assurance (IA) Samples and Tests with a Field Laboratory.


Conduct IA tests on split samples taken by the District Materials Coordinator.Testing performed will be as directed by the District Materials Coordinator.


Bitumen:

If the District Materials Coordinator conducts a test for sieve and viscosity accordingto tests listed in AASHTO T 59, “Emulsified Asphalts,” then for IA another sample is

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tested and the remaining sample is submitted to the Materials and Research Division.

Aggregate:

The District Materials Coordinator will obtain aggregate samples. These samples will be an equal split sample with the Engineer.

The District Materials Coordinator shall obtain and split aggregate samples according to ND T 2, “Sampling of Aggregate,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.”







Table 420-6 shows the tolerance between IA and acceptance tests.

Table 420-6 Test Tolerance ND T 11, “Materials Finer Than No. 200 Sieve in Mineral Aggregates by Washing, and ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”: 3/8 inch sieve ±7% No. 4 sieve ±7% No. 8 sieve ±7% No. 200 sieve ±2.5%

If the IA testing is not within specified tolerances, the District Materials Coordinator will obtain an additional sample for testing.

The Engineer and District Materials Coordinator will examine equipment used and review testing procedures. This will continue until the differences are resolved.

A sample of blotter material is not required.

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If the District Materials Coordinator has conducted a test for sieve and viscosityaccording to tests listed in AASHTO T 59, “Emulsified Asphalts,” then an IA must becompleted.

Table 420-7 shows test method and frequency for IA.

Table 420-7 Test Frequency AASHTO T 59, “Emulsified Asphalts” 1 test result per project. ND T 113, “Lightweight Pieces of Aggregate” 1 test result per project.

Table 420-8 shows the tolerance between IA and acceptance tests.

Table 420-8 Test Tolerance AASHTO T 59, “Emulsified Asphalts”: Sieve ±0.08% Viscosity 25º C ±15%

50º C ± 21% ND T 113, Lightweight Pieces in Aggregate ±3%


The District Materials Coordinator and Materials and Research personnel will examine equipment used and review testing procedures. This will continue until the differences are resolved.

420.04 Acceptance Samples and Tests without a Field Laboratory.





Bitumen:

The District Materials Coordinator will test the emulsified asphalt samples for sieve

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and viscosity only according to tests listed in AASHTO T 59, “Emulsified Asphalts.”

The sieve and viscosity tests may be waived if the Engineer determines there is not a consistency problem with the emulsion.

For all emulsions, one sample is randomly selected from the first and second halves of the project and send to the Materials and Research Division for testing.

Aggregate:

Obtain three random samples from each lot of cover coat material. Obtain and split aggregate samples according to ND T 2, “Sampling of Aggregate,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.”

Test all samples from the lot and determine acceptance of the lot based on the average of the tests. Table 420-9 shows test method and frequency.


*1 test result perlot.


*1 test result perlot.

ND T 113, “Lightweight Pieces of Aggregate” *1 test result perlot.

*Definition of a lot:• 1,200 tons;• If the final lot is less than 600 tons, include it in the previous lot• If the final lot is greater than 600 tons, it is a separate lot.• For ND T 113 a lot is every 10 miles or fraction thereof.• Lots continue from day to day. Each day does not start a new lot.


Obtain one sample of blotter material for every five miles or fraction thereof. Obtain these samples from material placed in a stockpile or material delivered directly to the project. Table 420-9 above lists the tests to be conducted excluding ND T 113.


Bitumen:

Test samples according to Section 818 of the NDDOT Standard Specifications forRoad and Bridge Construction for the appropriate material.

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Aggregate:

Perform L.A. Abrasion, AASHTO T 96, on a sample obtained during aggregate production. Table 420-10 shows test method and frequency.

Table 420-10 Test Frequency AASHTO T 96, “Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine”

*1 test result perproject.

*If the aggregate source has been tested previously by the Department and the material is withinallowable limits, the test for L.A. Abrasion will not be required.

420.05 Independent Assurance (IA) Samples and Tests without a Field Laboratory.


Reserved.


Conduct IA tests on split samples. Obtain and split the sample. Submit a splitsample to Materials and Research.


Bitumen:

If the District Materials Coordinator has conducted a test for sieve and viscosityaccording to tests listed in AASHTO T 59, “Emulsified Asphalts,” then the followingmust be completed. Tests and frequency for IA for viscosity and sieve are shown inTable 420-11.

Table 420-11 Test Frequency AASHTO T 59, “Emulsified Asphalts” 1 test result per project.

Tolerances between IA and acceptance tests are in Table 420-12.

Table 420-12 Test Tolerance AASHTO T 59, “Emulsified Asphalts”: Sieve ±0.08% Viscosity 25º C ±15%

50º C ± 21%

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Aggregate:

Obtain and split aggregate samples according to ND T 2, Sampling of Aggregate and ND T 248, Reducing Samples of Aggregate to Testing Size. Table 420-13 shows test method and frequency.


1 test per 10 miles or fraction thereof.


1 test per 10 miles or fraction thereof.

ND T 113, “Lightweight Pieces of Aggregate” 1 test per 10 miles or fraction thereof.

Compute the sieve analysis on SFN 9987, “Aggregate Sample Worksheet.” Results are recorded on SFN 10072, “Aggregate Quality Test Summary.” Table 420-14 shows tolerance between IA and acceptance tests.

Table 420-14 Test Tolerance ND T 11, Materials Finer Than No. 200 Sieve in Mineral Aggregates by Washing, and ND T 27, “Sieve Analysis of Fine and Coarse Aggregates”: 3/8 inch sieve ±7% No. 4 sieve ±7% No. 8 sieve ±7% No. 200 sieve ±2.5% ND T 113, Lightweight Pieces in Aggregate ±3%

If the IA testing is not within specified tolerances, the District Materials Coordinator obtains an additional sample for testing.


A sample of blotter material is not required.

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Section 421 Micro Surfacing

421.01 Description.

This work consists of applying a thin overlay material of modified emulsified asphalt, aggregate, water and additives over a prepared surface.

421.02 Acceptance Sampling and Testing During Stockpiling.

Engineer Responsibility.

Obtain and split aggregate samples according to ND T 2, “Sampling of Aggregate,” and ND T 248, “Reducing Samples of Aggregate to Testing Size.”

Obtain five independent samples from the stockpile. Each sample is tested separately.

Table 421-1 shows test methods to be conducted and frequency of testing.


Minimum of one per project



ND T 176, “Plastic Fines in Graded Aggregates and Soils by Use of Sand Equivalent Test”


Compute the sieve analysis results on SFN 9987, “Aggregate Sample Worksheet” and sand equivalent on SFN 51730, “Sand Equivalent of Fine Aggregate.”

421.03 Acceptance Sampling and Testing During Mix Production.


Obtain material for determining moisture content.

Table 421-2 shows test methods to be conducted and frequency of testing.

Table 421-2 Test Frequency ND T 255, “Total Evaporable Moisture Content of Aggregate by Drying”

3 test results per day.

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Bitumen shall be sampled by the Contractor under the observation of the Engineer. Two samples of bitumen shall be obtained from each load delivered to the project. The Engineer shall take possession of both samples. Ensure material is sampled according to NDDOT 1, “Sampling of Bituminous Materials.” Table 421-3 shows test methods to be conducted and frequency of testing.

Submit samples to Materials and Research for testing.

B. Materials and Research Division Responsibility.

Bitumen:

Materials and Research tests the random sample from both halves of the project. If the samples pass, the entire project is accepted with no further testing.

If one sample passes from either half of the project then that half is accepted with no further testing.

If one sample fails, then all samples from that half of the project are submitted to Materials and Research for testing.

Materials and Research will inform the District when